- Hypothesis 1d: Youth assigned to MDFT and FMII/group will show greater reductions than youth in standard care in problems related to alcohol use, including drug use, drinking and driving, alcohol-related injury, health and mental health problems, school problems, delinquency, and association with substance abusing peers at the 3 month follow-up (end of treatment). Youth in MDFT will show greater reductions in these problems than FMII/group and standard care in the post-treatment period and up to 18 month follow-up.